INTERMEDIATES FOR THE PREPARATION OF HALICHONDRIN B - Patent 1771431

(19)

(11)

EP 1 771 431 A1

(12)

(43)	Date of publication:
	11.04.2007 Bulletin 2007/15

(21)	Application number: 05760356.5

(22)	Date of filing: 03.06.2005

(51)

International Patent Classification (IPC):

C07D 307/28^(2006.01)

(86)	International application number:
	PCT/US2005/019669

(87)	International publication number:
	WO 2005/118565 (15.12.2005 Gazette 2005/50)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR LV MK YU

(30)

Priority:

03.06.2004 US 576642 P
10.11.2004 US 626769 P
18.03.2005 US 663300 P

(71)	Applicant: Eisai Co., Ltd.
	Tokyo 112-8088 (JP)

(72)	Inventors:
	AUSTAD, Brian Tewksbury, MA 01876 (US) CHASE, Charles, E. Londonderry, NH 03053 (US) FANG, Francis, G. Andover, MA 01810 (US)

(74)	Representative: Sexton, Jane Helen
	J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5JJ London WC1R 5JJ (GB)

(54)	INTERMEDIATES FOR THE PREPARATION OF HALICHONDRIN B